Why PHP powers most of the web - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print "Hello, World!" in PHP.

PHP

<?php
echo [1];
?>

Drag options to blanks, or click blank then click option'

Aprint('Hello, World!')

BHello, World!

C'Hello World'

D"Hello, World!"

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the string.

Using print() inside echo.

The echo statement in PHP outputs the string. The string must be in quotes.

2fill in blank

medium

Complete the code to declare a variable named $name with the value "PHP".

PHP

<?php
[1] = "PHP";
?>

Drag options to blanks, or click blank then click option'

Aname

B$name

Cvar name

Dlet $name

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the $ before the variable name.

Using JavaScript style variable declarations.

In PHP, variables start with a dollar sign ($).

3fill in blank

hard

Fix the error in the code to correctly concatenate strings in PHP.

PHP

<?php
$name = "PHP";
echo "I love " [1] $name;
?>

Drag options to blanks, or click blank then click option'

A&

B+

C.

D,

Attempts:

3 left

💡 Hint

Common Mistakes

Using + instead of . for string concatenation.

Using commas inside echo without quotes.

In PHP, the dot (.) operator is used to join strings.

4fill in blank

hard

Fill both blanks to create an associative array with keys 'language' and 'year'.

PHP

<?php
$info = array([1] => "PHP", [2] => 1995);
?>

Drag options to blanks, or click blank then click option'

A"language"

Blanguage

C"year"

Dyear

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting quotes around keys.

Using variables instead of strings as keys.

Array keys should be strings in quotes.

5fill in blank

hard

Fill all three blanks to loop through the array and print each key and value.

PHP

<?php
$info = array("language" => "PHP", "year" => 1995);
foreach([1] as [2] => [3]) {
    echo "$key: $value\n";
}
?>

Drag options to blanks, or click blank then click option'

A$info

B$key

C$value

D$array

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong variable names in foreach.

Omitting the => in foreach.

The foreach loop uses the array variable, then key and value variables.